Fuji Electric Frenic-Sce, Instruction Manual

Page: 69 / 78

6-6
6.3.2 Causes, checks and measures of alarms
This chapter describes how to proceed in case of specific alarms. For alarms not mentioned in this manual please
refer to the User Manual.
[ 1 ]
ecf
EN circuit failure
Phenomena Enable circuit state was diagnosed and a circuit failure was detected.
Possible Causes Check and Measures
(1) Contact defect on control
terminal board
[Subcode: 10]
Confirm that the control terminal board is firmly mounted on the inverter
body.

Alarm is released by turning on again.
(2) Enable circuit logic failure
[Subcode: 3000] Confirm that outputs from safety switch etc. are inputted by the same
logic (High/High or Low/Low) with EN1 terminal/EN2 terminal.

Alarm is released by turning on again.
(3) A failure (single failure) of
enable circuit (safety stop
circuit) was detected.
If the circuit failure is not removable by the procedures above, the
inverter is out of order.

Contact your Fuji Electric representative.
[ 2 ]
ecl
Customizable logic failure
Phenomena A setting failure of customizable logic was detected.
Possible Causes Check and Measures
(1) Setting of the selection of
customizable logic operation was
changed during operation.
Check whether the selection (Function code U00) of customizable logic
operation is changed during operation.

Do not change the selection of customizable logic operation during
operation to prevent a danger.
[ 3 ]
er7
Tuning error
Phenomena Auto-tuning failed.
Possible Causes Check and Measures
(1) A phase was missing in the
connection between the inverter
and the motor.

Properly connect the motor to the inverter.
(2) V/f or the rated current of the
motor was not properly set.
Check whether the data of function codes (F04*, F05*, H50, H51, H52,
H53, H65, H66, P02*, P03*) agree with the motor modes.
(3) The wiring length between the
inverter and the motor was too
long.
Check whether the wiring length between the inverter and the motor
exceeds 50 m. Inverters with a small capacity are greatly affected by
the wiring length.

Review, and if necessary, change the layout of the inverter and the
motor to shorten the connection wire. Alternatively, minimize the
wiring length without changing the layout.

Disable both auto-tuning and auto-torque boost (set data of F37* to
"1").
(4) The rated capacity of the motor
was significantly different from
that of the inverter.
Check whether the rated capacity of the motor is three or more ranks
lower, or two or more ranks higher than that of the inverter.

Replace the inverter with one with an appropriate capacity.

Set motor constants (P06*, P07*, P08*) manually.

Disable both auto-tuning and auto-torque boost (set data of F37* to
"1").
(5) The motor was a special type
such as a high-speed motor.

Disable both auto-tuning and auto-torque boost (set data of F37* to
"1").
(6) Tuning (P04*=2) operation was
performed of rotating a motor in
a state that brake is applied to
the motor.

Specify the tuning that does not involve the motor rotation (P04* =
1).

Perform the tuning (P04*=2) with the motor brake released.